Associations of vitamin D status with colorectal cancer risk and survival
Menée à partir de données de la "UK Biobank" portant sur 360 061 personnes et sur 2 509 patients atteints d'un cancer colorectal, cette étude évalue l'association entre la concentration sérique en 25-hydroxyvitamine D et le risque de développer la maladie ainsi que la survie spécifique
Biological evidence suggests that vitamin D has numerous anti-cancer functions, but the associations between vitamin D status and colorectal cancer (CRC) risk and survival remain inconclusive. Based on UK Biobank, we prospectively evaluated the associations of season-standardized 25-hydroxyvitamin D (25(OH)D) concentrations with CRC risk among 360,061 participants, and with survival among 2,509 CRC cases. We observed an inverse linear relationship between 25(OH)D concentrations and CRC risk (P for linearity = 0.01; HR per 1-standard deviation increment, 0.95; 95% CI, 0.91-0.99). Compared to the lowest quartile of 25(OH)D, the highest quartile was associated with a 13% (HR, 0.87; 95% CI, 0.77-0.98) lower risk of CRC. For CRC survival, compared to those in the lowest quartile of 25(OH)D, cases in the highest quartile had a 20% (HR, 0.80; 95% CI, 0.65-0.99) lower risk for overall death. Our findings indicate that higher concentrations of serum 25(OH)D are associated with lower incidence and improved survival of CRC, suggesting a role of vitamin D in the pathogenesis of CRC.